Wednesday
November 26, 2014

Homework Help: Precalculus

Posted by Alonzo on Thursday, March 11, 2010 at 1:47pm.

Rosea drives her car 30 kilometers to the train station, where she boards a train to complete her trip. The total trip is 120 kilometers. The average speed of the train is 20 kilometers per hour faster than that of the car. At what speed must she drive her car if the total time for the trip is less than 2.5 hours?

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